<template>
  <div class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avater_box">
        <img src="../assets/logo.png" alt="" />
      </div>
      <!-- 登录区域 -->
      <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules" label-width="0px" class="login_form">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input v-model="loginForm.username" prefix-icon="iconfont icon-user"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input v-model="loginForm.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
        </el-form-item>
        <!-- 按钮区域 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetloginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
data () {
    return {
        // 登陆表单的数据绑定对象
        loginForm: {
            username: 'admin',
            password: '123456'
        },
        // 表单的验证规则对象
        loginFormRules: {
            // 验证用户名是否合法
            username: [
                { required: true, message: '请输入用户名称', trigger: 'blur' },
                { min: 3, max: 10, message: '长度在 3 到 10 位字符', trigger: 'blur' }
            ],
            // 验证密码是否合法
            password: [
                { required: true, message: '请输入用户密码', trigger: 'blur' },
                { min: 6, max: 8, message: '长度在 6 到 8 位数字', trigger: 'blur' }
            ]
        }
    }
},
methods: {
  // 点击重置按钮，重置登录表单
  resetLoginForm () {
  // console.log(this) resetFields
  this.$refs.loginFormRef.resetFields()
  },
  login () {
    // validate
    this.$refs.loginFormRef.validate(async valid => {
      if (!valid) return false
      const { data: res } = await this.$http.post('login', this.loginForm)
      if (res.meta.status !== 200) return this.$message.error('登陆失败')
      this.$message.success('登陆成功')
      // token 只应该在当前网站打开区间生效，所以将token保存在sessionStorage中
      window.sessionStorage.setItem('token', res.data.koken)
      // 通过编程式导航跳转到后台主页，路由地址是/home
      this.$router.push('/home')
    })
  }
}
}
</script>

<style lang="less" scoped>
.login_container {
  height: 100%;
  background-color: #2b4b6b;
}
.login_box {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  transform: translate(-50%, -50%);

  .avater_box {
    position: absolute;
    left: 50%;
    width: 130px;
    height: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    // 给内边距
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}
// 登录区域
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0 20px;
  // 划重点box-sizing: border-box;
  box-sizing: border-box;
}
.btns {
  // 弹性盒模型
  display: flex;
  justify-content: flex-end;
}
</style>
